The PMX is Beretta's 9 mm submachine gun, offered to civilians in some markets in semi automatic form. Its factory furniture is basic, and Toni System makes two parts that change how it handles and what it can carry.
Handguard
Toni System's replacement handguard is slim polymer, railed on three sides for an optic, light or grip, and supplied with a flash hider. Ventilation windows let heat escape from the barrel during long strings. It is in Handguards for Beretta PMX.
Any AR-15 stock
The folding adapter converts the PMX to accept any standard AR-15 stock. You can choose a stock with the length of pull and cheek rest you prefer, fold it for transport and open it for use. A stock that fits you gives a consistent shoulder weld, which helps recoil control and quick follow up shots. The adapter is in Stocks for Beretta PMX.
Why both
With a stock that fits and rails for an optic, the PMX becomes a capable pistol calibre carbine for training and sport.
Frequently asked questions
Is an AR-15 stock included?
No. The adapter accepts any standard AR-15 stock, sold separately.
Does the handguard need a gunsmith?
Usually not; the product page explains how it goes on.